MESON Chess Problem Database

Problem Display
PID: 4809 (3B1Q2/8/8/3pkp2/8/1B3P2/8/3K4 w - - 0 1)

Clark, WA

3rd Prize, The Schoolmaster, 1891

3B1Q2/8/8/3pkp2/8/1B3P2/8/3K4

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe7#
    • 1...d4
      • 2.Bc7#
    • 1...f4
      • 2.Qf6#
  • Tries
    • 1.Kd2?
      • 1...Kd4
        • 2.Bf6#
      • 1...Ke6
        • 2.Qe7#
      • 1...d4
        • 2.Bc7#
      • 1...f4
        • 2.Qf6#
      • 1...Kf4!
    • 1.Bg5?
      • threat
        • 2.Qf6#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kd4!
    • 1.Bf6+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kf4!
    • 1.Qb4?
      • 1...Ke6
        • 2.Qe7#
      • 1...d4
        • 2.Qb8#
      • 1...f4!
    • 1.Qc5?
      • 1...Ke6
        • 2.Qe7#
        • 2.Qxd5#
      • 1...f4
        • 2.Qxd5#
      • 1...Kf4!
    • 1.Qh6?
      • 1...f4
        • 2.Qf6#
      • 1...d4
        • 2.Bc7#
      • 1...Kd4!
  • Keys
    • 1.Ke2!
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf4
        • 2.Qd6#
      • 1...Ke6
        • 2.Qe7#
      • 1...d4
        • 2.Bc7#
      • 1...f4
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
    • P(a);SBLOCK::B(D)
    • P(c);::QAB1(E)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(D)
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
        • P(a);SBLOCK::B(D)
        • P(c);::QAB1(E)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • B(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
        • P(a);SBLOCK::QAB(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);P_PINP(a)
      • Vars
        • P(c);SBLOCK::QAR1(E),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(c);::QAB1(E)
        • P(a);SBLOCK::B(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(b);S_FLIGHT::B(D)
      • K(b);P_SPINP(c),S_FLIGHT::QAB(E)
      • K(b);P-FLIGHT,P_SPINP(a)::QAR1(E)
      • P(a);SBLOCK::B(D)
      • P(c);::QAB1(E)
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